In a large bowl, (I use my stock pot) mix together flour, sugar, bran, and bran cereal. Set aside.,______,Stir in the raisins, or whatever you may have.,Store in the refrigerator in an airtight container.,To Bake:.,Preheat oven to 375*,Line muffin tins with paper if desired and fill 3/4's full.,Bake for 20 minutes.